Short Oil Alkyd Resin Formulation
Short oil alkyd resin is a type of alkyd resin commonly used in the production of paints, coatings, and varnishes. Alkyd resin formulations can vary significantly depending on the specific properties and requirements of the end product, such as paint, coatings, or varnishes.
Components of short oil alkyd resin formulation:
- Polyhydric Alcohol: The base of an alkyd resin is a polyhydric alcohol, which provides the hydroxyl (-OH) functional groups needed for the reaction. Common polyhydric alcohols include glycerol and pentaerythritol.
- Polybasic Acid: A polybasic acid is used to provide the carboxyl (-COOH) functional groups for the reaction. Common polybasic acids include phthalic anhydride, maleic anhydride, and isophthalic acid.
- Drying Oil: Drying oils, typically derived from vegetable sources like linseed oil or soybean oil, are added to the formulation. Drying oils contain unsaturated fatty acids that contribute to the cross-linking and drying properties of the alkyd resin.
- Solvents: Solvents are used to dissolve and control the viscosity of the resin during the formulation process. Common solvents include mineral spirits or xylene.
- Catalysts: Catalysts or driers add to promote the oxidative cross-linking of the resin and accelerate drying. Common catalysts include metal salts, such as cobalt naphthenate.
- Modifiers/Additives: Various modifiers and additives take parts to tailor the properties of the alkyd resin. These may include antioxidants, UV stabilizers, color pigments, and flow control agents.
Steps in resin formulation
- Polyesterification: The first step involves the reaction between the polyhydric alcohol and the polybasic acid. This polyesterification reaction and its results in the formation of a polyester backbone with ester linkages.
- Oil Incorporation: The drying oil adds in polyester material and is esterify with the remaining hydroxyl groups on the polyester chain. This step is crucial for enhancing the drying and film-forming properties of the alkyd resin.
- Solvent Addition: Solvent additions may control the viscosity of the resin and make it suitable for application.
- Catalyst Addition: Catalysts introduced to facilitate the oxidative cross-linking of the resin .which is later on responsible for the resin’s drying and curing properties.
- Modifiers and Additives: Modifiers or additives, such as pigments, UV stabilizers, or flow control agents because it adds to customize the resin’s properties.
- Reaction and Aging: The formulated resin may undergo further reactions and aging to optimize its performance and stability.
With a kind of short production cycle, viscosity is high, and clean priming can improve paint polish, salt water resistance, thermo stability, impact resistance and paint film short oil alcohol acid resin donning rate and Method of Preparation The method of preparation of most carrying clear priming paints is to apply this short oil ethyl alcohol acid resin.
There are four types of Alkyd resin which of them are,
- short oil alkyd resin
- medium oil alkyd resin
- long oil alkyd resin
- very long oil alkyd resin
It depends on you which formulation is suitable to start up the resin industry because it makes your brand product.